An orally available inhibitor of spleen tyrosine kinase (Syk), with potential immunomodulating and antineoplastic activities. Upon oral administration of Syk inhibitor HMPL-523, this agent binds to and inhibits the activity of Syk. This inhibits B-cell receptor (BCR) signaling, which leads to the inhibition of B-cell activation, and prevents tumor cell activation, migration, adhesion and proliferation. Syk, a non-receptor cytoplasmic, BCR-associated tyrosine kinase, is expressed in hematopoietic tissues and is often overexpressed in hematopoietic malignancies; it plays a key role in B-cell receptor signaling. Check for active clinical trials using this agent. (NCI Thesaurus)
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